ESPRESSO: design and analysis of Coudé-Train concepts for stable and efficient optical feeding
| Autor: | Paolo Di Marcantonio, Filippo Maria Zerbi, Gerardo Avila, Nuno C. Santos, André Moitinho, António Amorim, Francesco Pepe, J. M. Herreros, Alexandre Cabral, João Coelho, Stefano Cristiani, Jorge Lima, Pedro Carvas, Rafael Rebolo, Denis Mégevand, José Manuel Rebordão, Christophe Lovis |
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| Rok vydání: | 2010 |
| Předmět: |
Physics
Very Large Telescope business.industry Astrophysics::Instrumentation and Methods for Astrophysics 02 engineering and technology 021001 nanoscience & nanotechnology Bearing (navigation) 01 natural sciences law.invention 010309 optics Telescope Espresso Optics Observatory law 0103 physical sciences Electronic engineering Astrophysics::Solar and Stellar Astrophysics 0210 nano-technology business Baseline (configuration management) Throughput (business) Spectrograph |
| Zdroj: | SPIE Proceedings. |
| ISSN: | 0277-786X |
| Popis: | The first purpose of ESPRESSO is to develop a competitive, innovative high-resolution spectrograph to fully exploit the potentiality of the Very Large Telescope (VLT) of the European Southern Observatory and to allow new science. It is thus important to develop the VLT array concept bearing in mind the need to obtain the highest stability, while preserving an excellent efficiency. This high-resolution ultra-stable spectrograph will be installed at the VLT Combined Coude Laboratory. A Coude Train carries the light from the Nasmyth platforms to the Combined Coude Laboratory, where it feeds the spectrograph. Several concepts can be envisaged for the Coude Train depending on the use of mirrors, prisms and lenses or fibers or any of the possible combinations of these elements. Three concepts were selected for analysis, one based on purely optical components and two other using fibers (with different lengths). These concepts have different characteristics in terms of efficiency, stability, complexity, and cost. The selection of the baseline concept took into account all these issues. In this paper, we present for each concept the optical setups, their opto-mechanical implementation and analyze the expected throughput efficiency budget, and we also detail the current baseline concept. |
| Databáze: | OpenAIRE |
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